CN111136433B - Method for processing insert cutting edge of trimming die - Google Patents
Method for processing insert cutting edge of trimming die Download PDFInfo
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- CN111136433B CN111136433B CN201911394245.6A CN201911394245A CN111136433B CN 111136433 B CN111136433 B CN 111136433B CN 201911394245 A CN201911394245 A CN 201911394245A CN 111136433 B CN111136433 B CN 111136433B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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Abstract
The invention provides a method for processing an insert cutting edge of a trimming die, which belongs to the technical field of stamping dies and comprises the working procedures of processing the bottom surface of an insert, processing a front reference surface of the insert, manufacturing an insert mounting hole, roughly processing an insert cutting edge, quenching the insert cutting edge, processing a die holder, mounting the insert on a designated position of the die holder and finely processing the insert cutting edge. The method comprises the following steps of performing rough machining on the population of the insert before the insert is assembled, then quenching the insert, and then assembling the insert on a die holder for performing integral secondary finish machining. According to the method for processing the cutting edge of the trimming die insert, provided by the invention, the cutting edge of the insert is subjected to rough processing before the insert is quenched, and is quenched after the rough processing, so that the deformation at the cutting edge of the insert caused by quenching is eliminated, more castings at the cutting edge of the insert are eliminated by the rough processing, the quenching depth can be ensured, meanwhile, the cutting edge of the insert is subjected to further fine processing after quenching, the deformation at the cutting edge of the insert is corrected, and the processing precision of the cutting edge is improved.
Description
Technical Field
The invention belongs to the technical field of stamping dies, and particularly relates to a method for machining an insert cutting edge of a trimming die.
Background
With the development of economy in China, the popularization rate of automobiles in life is higher and higher. The automobile covering part is an important part for supporting a vehicle body and other parts of an automobile, and the automobile covering part needs to be formed by drawing, trimming, punching and the like of a plate in sequence by using a stamping die in the manufacturing process. However, the existing trimming and punching die mostly has the problem of poor cutting edge precision during processing.
Disclosure of Invention
The invention aims to provide a method for processing a cutting edge of an insert of a trimming die, and aims to solve the problem of poor processing precision of the cutting edge of the trimming and punching die in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for processing the cutting edge of the trimming die insert comprises the following steps:
processing the bottom surface of the insert, and grinding the bottom surface of the insert;
processing an insert front reference surface, and processing a plurality of reference tables on the insert front by taking the processed insert bottom surface as a reference, wherein the plurality of reference tables are all arranged in parallel with the insert bottom surface and are all positioned in the same plane;
making an insert mounting hole, and processing a mounting screw hole and a positioning pin hole on an insert according to the drawing size by taking any two mutually perpendicular blank surfaces on the side surface of the insert as a reference;
roughly machining the cutting edges of the inserts, taking the positioning pin holes of the inserts as a reference, and performing independent rough machining on the cutting edge of each insert, and reserving machining quantities at the cutting edges of the inserts and the splicing seams of the inserts;
quenching the insert cutting edge, and naturally cooling in air;
processing the die holder, processing the mounting surface for mounting the insert on the die holder in place, and assembling the insert to a specified position on the die holder; and
and (4) finely machining the cutting edges of the inserts, and simultaneously machining the cutting edges of all the inserts in place.
As another embodiment of the present application, before the step of processing the die holder, the method further includes the following steps:
and grinding the bottom surface and the abutted seams of the insert, and grinding the abutted seams of the bottom surface and the side surfaces of the insert to ensure that the flatness of the abutted seams of the bottom surface and the side surfaces of the insert is less than 0.05 mm.
As another embodiment of the present application, the step of processing the die holder includes:
roughly machining the bottom surface of the die holder, wherein the front surface of the die holder faces upwards, at least four reference surfaces are machined on the front surface of the die holder, the die holder is turned over, and the bottom surface of the die holder is roughly machined;
the fine machining die holder bottom surface is subjected to fine machining, and a positioning key groove for determining the position of the die holder on the press machine and other structural surfaces on the bottom surface are machined on the die holder bottom surface;
making reference holes, namely making the front surface of the die holder face upwards, and processing at least three reference holes and at least three reference surfaces on the die holder by taking a positioning key slot at the bottom of the die holder and the bottom surface as references;
and processing an insert mounting surface, taking the reference hole and the reference surface on the die holder as references, processing a mounting surface for mounting the insert and other structural surfaces on the front surface of the die holder, and pointing out the position of the insert mounting screw hole.
As another embodiment of the present application, the step of finishing the bottom surface of the die holder further comprises:
and vibration aging, namely vibrating the die holder by using a vibration device, wherein the vibration time is longer than 4 hours, and the position of the vibration device on the die holder is replaced every 1 hour in the vibration process.
As another embodiment of the present application, the tolerance range of the reference hole in the reference hole making step is +0mm to +0.05 mm.
As another embodiment of the present application, in the step of roughly machining the cutting edge of the insert, a plurality of inserts are mounted on the same process plate for performing the milling process.
As another embodiment of the application, in the step of roughly machining the cutting edge of the insert, when the insert is installed on a process plate, the distance between the insert and the insert is more than 50 cm.
As another embodiment of the application, the tolerance range of the diameter size of the insert mounting screw hole in the insert mounting hole manufacturing step is +0mm- +0.05mm, and the tolerance range of the diameter size of the dowel hole of the insert is +0mm- +0.05 mm.
As another embodiment of the application, in the step of roughly machining the cutting edge of the insert, the machining amount of the insert is set to be 0.3-0.5 mm along the cutting edge direction of the insert, and the machining amount of the splicing surface of the insert and the adjacent insert is set to be 0.3-0.5 mm.
As another embodiment of the application, the quenching mode in the insert cutting edge quenching step is flame quenching, and the temperature of the flame quenching is 630-650 ℃.
The method for processing the cutting edge of the trimming die insert has the advantages that: compared with the prior art, the method has the advantages that after the bottom surface of the insert is machined, the mounting hole and the dowel hole of the insert are machined by taking the machined bottom surface and any two mutually perpendicular blank surfaces as references, the population of the insert is roughly machined before the insert is assembled, then the insert is quenched, and then the insert is assembled on the die holder for integral secondary fine machining. According to the method for processing the cutting edge of the trimming die insert, the cutting edge of the insert is roughly processed before the insert is quenched, and the insert is quenched after rough processing, so that the deformation of the cutting edge of the insert caused by quenching is eliminated, more castings at the cutting edge of the insert are eliminated by rough processing, the quenching depth can be ensured, meanwhile, the cutting edge of the insert is further finely processed after quenching, the deformation at the cutting edge of the insert is corrected, and the processing precision of the cutting edge is greatly improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for trimming the cutting edge of a die insert provided by an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the method for machining the cutting edge of the trimming die insert according to the present invention will now be described. The method for processing the cutting edge of the trimming die insert comprises the following steps:
processing the bottom surface of the insert, firstly processing at least two coarse reference platforms on the front surface of the insert, processing the bottom surface of an insert casting by using a milling machine according to the size of the sticking quantity of the cast insert and ensuring that the processing quantity of the front surface of the insert is more than 5mm, and then grinding the bottom surface of the insert by using a grinding machine;
processing a reference surface on the front face of the insert, clamping the insert on a workbench of a numerical control machine by using the numerical control machine, and processing a plurality of reference tables on the front face of the insert by taking the bottom face of the processed insert as a reference, wherein the plurality of reference tables are all arranged in parallel with the bottom face of the insert and are all positioned in the same plane;
manufacturing an insert mounting hole, keeping the right side of the insert upward, and processing a mounting screw hole and a positioning pin hole in the insert according to the drawing size by taking any two mutually perpendicular blank surfaces on the side surface of the insert as a reference;
roughly machining the cutting edges of the inserts, straightening and aligning by taking a positioning pin hole of the insert as a reference and usually taking the center positions of two pin holes as a reference, then establishing a coordinate system, carrying out independent rough machining on the cutting edge of each insert according to a machining program provided by a programmer, and reserving machining quantities at the cutting edges of the inserts and the splicing seams of the inserts;
quenching the insert cutting edge, and naturally cooling in air;
processing the die holder, processing the mounting surface for mounting the insert on the die holder in place, and assembling the insert to a specified position on the die holder; when the inserts are assembled, one or more inserts are required to be selected as positioning inserts, and then other inserts are assembled on two sides of the positioning inserts in sequence; and
and (3) finely machining the cutting edges of the inserts, and simultaneously machining the cutting edges of all the inserts in place, wherein the machining comprises simultaneously machining all the cutting edge profiles and the punch mounting surfaces on the die holders in place.
Compared with the prior art, the method for machining the cutting edge of the trimming die insert provided by the embodiment has the advantages that after the bottom surface of the insert is machined, the mounting hole and the dowel hole of the insert are machined by taking the machined bottom surface and any two mutually perpendicular blank surfaces as references, the cutting edge of the insert is roughly machined before the insert is assembled, then the insert is quenched, and then the insert is assembled on the die holder for integral secondary finish machining. According to the method for processing the cutting edge of the trimming die insert, the cutting edge of the insert is roughly processed before the insert is quenched, and the insert is quenched after rough processing, so that the deformation of the cutting edge of the insert caused by quenching is eliminated, more castings at the cutting edge of the insert are eliminated by rough processing, the quenching depth can be ensured, meanwhile, the cutting edge of the insert is further finely processed after quenching, the deformation at the cutting edge of the insert is corrected, and the processing precision of the cutting edge is greatly improved.
As a specific implementation mode of the method for processing the cutting edge of the trimming die insert, the method comprises the following steps before the step of processing the die holder:
and grinding the bottom surface and the abutted seams of the insert, and grinding the abutted seams of the bottom surface and the side surfaces of the insert by using a reference grinding plate to ensure that the flatness of the abutted seams of the bottom surface and the side surfaces of the insert is less than 0.05 mm. The bottom surface and the abutted seams of the insert are ground before the insert is installed, so that the flatness of the bottom surface and the abutted seams of the insert is better, the bottom surface of the insert is better attached to a die holder installation surface when the insert is assembled, two adjacent inserts are better attached to each other, gaps between the inserts are reduced, and errors generated when the inserts are assembled are reduced.
As a specific implementation mode of the method for processing the cutting edge of the trimming die insert provided by the invention, the step of processing the die holder comprises the following steps:
roughly machining the bottom surface of the die holder, wherein the front surface of the die holder faces upwards, machining at least four reference surfaces on the front surface of the die holder, turning the die holder, roughly machining the bottom surface of the die holder, firstly taking a ground blank surface as a reference before machining, taking scribed lines arranged on the side surface of the die holder during casting of the die holder as limiting platforms for referring to four corners on the front surface of the die holder, turning the die holder after machining is finished, and roughly machining the bottom surface of the die holder by taking the limiting platforms as a reference;
finely machining the bottom surface of the die holder, keeping the bottom surface of the die holder still after rough machining of the bottom surface of the die holder is completed, adjusting the feeding speed and the cutting amount of each machining, finely machining the bottom surface of the die holder, and machining a positioning key groove for determining the position of the die holder on a press machine and other structural surfaces on the bottom surface of the die holder;
making reference holes, namely making the front side of the die holder upwards, processing at least three reference holes and at least three reference surfaces on the die holder by taking a positioning key groove at the bottom of the die holder and the bottom surface as references, and engraving coordinate values near the reference holes or the reference surfaces according to coordinates measured by a machine tool after the reference holes and the reference platform are processed;
and processing an insert mounting surface, taking a reference hole and a reference surface on the die holder as references, processing a mounting surface for mounting an insert and other structural surfaces on the front surface of the die holder, and pointing out the position of an insert mounting screw hole, wherein a pit with the depth of 0.5mm-1mm is processed on the insert mounting surface at the insert position by using a pit cutting tool.
Referring to fig. 1, before the step of finishing the bottom surface of the die holder, the method further includes vibrating the die holder for aging, and vibrating the die holder by using a vibrating device, wherein when the vibration time is longer than 4 hours, the position of the vibrating device mounted on the die holder is changed every 1 hour during the vibrating process. The aging vibration is used for eliminating the stress in the die holder, the vibration equipment is fixed at the bottom of the die holder, then the die holder is driven to vibrate, the residual stress in the die holder is eliminated through vibration, the die holder is prevented from deforming again after finish machining, the vibration aging is carried out at four corners of the die holder, the fixed positions of the vibration aging equipment are replaced every 1 hour, the die holder stress is released more uniformly, and the die holder is prevented from deforming due to stress release after machining.
As a specific implementation mode of the cutting edge processing method for the trimming die insert provided by the invention, the tolerance range of the reference hole in the reference hole making step is +0 mm-0.05 mm, and the tolerance range of the reference hole can be used for ensuring that the processing precision of each part of the die is better on the premise of effectively ensuring the processing efficiency.
Referring to fig. 1, as a specific embodiment of the method for machining the cutting edge of the trimming die insert provided by the present invention, in the step of roughly machining the cutting edge of the insert, a plurality of inserts are mounted on the same process plate and subjected to milling. The insert machining device has the advantages that a plurality of inserts can be installed on the same process plate, a plurality of inserts can be machined at one time in the process of numerical milling, only numerical control programmers are needed to set the installation positions of the inserts in advance and program the inserts according to the set positions, then numerical control operators install the inserts on the process plate according to the set positions in advance, the actual positions and the theoretical positions of the inserts on the process plate can be kept consistent, the purpose of machining the inserts at the same time can be achieved, and the machining efficiency of the inserts is greatly improved.
Referring to fig. 1, as a specific embodiment of the method for machining the cutting edge of the trimming die insert provided by the present invention, when the insert is mounted on the process plate in the step of roughly machining the cutting edge of the insert, the distance between the insert and the insert is greater than 50 cm. The distance between the insert and the insert is larger than 50cm, so that the cutter of the machine tool can safely pass through the insert in the machining process, the cutter is prevented from colliding with the adjacent insert on the same process plate to generate cutter collision when one insert is machined, and the insert is machined more safely.
Referring to fig. 1, in the step of manufacturing the insert mounting hole, the tolerance range of the diameter size of the insert mounting screw hole is +0mm to +0.05mm, and the tolerance range of the diameter size of the dowel hole of the insert is +0mm to +0.05 mm. The diameters of the mounting screw hole and the positioning pin hole are guaranteed within the tolerance range, and the machining precision of the edge of the insert can be more accurate when the cutting edge of the insert is machined by taking the positioning pin hole as a reference.
Referring to fig. 1, in the step of roughly processing the cutting edge of the insert, the processing amount of the cutting edge of the insert is set to be 0.3mm to 0.5mm along the cutting edge direction of the insert, and the processing amount of the splicing surface between the insert and an adjacent insert is set to be 0.3mm to 0.5 mm. The flow rate is 0.3mm-0.5mm during rough machining, so that the thickness of a quenching layer can be ensured to be within a required range during quenching, the deformation of the cutting edge of the insert can be ensured not to exceed the reserved amount during finish machining, and the conditions of gaps at the cutting edge and improper machining can be prevented on the premise of ensuring the hardness of the cutting edge after quenching.
Referring to fig. 1, as a specific embodiment of the method for processing the cutting edge of the trimming die insert provided by the present invention, the quenching manner in the insert cutting edge quenching step is flame quenching, and the temperature of the flame quenching is 630-. And (3) performing flame quenching by adopting flame quenching, wherein an acetylene flame gun is used for performing surface flame quenching along the cutting edge direction of the insert, and the moving speed of the acetylene flame gun is ensured to be about 0.4 mm/s.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The method for processing the cutting edge of the trimming die insert is characterized by comprising the following steps of:
processing the bottom surface of the insert, and grinding the bottom surface of the insert;
processing an insert front reference surface, and processing a plurality of reference tables on the insert front by taking the processed insert bottom surface as a reference, wherein the plurality of reference tables are all arranged in parallel with the insert bottom surface and are all positioned in the same plane;
making an insert mounting hole, and processing a mounting screw hole and a positioning pin hole on an insert according to the drawing size by taking any two mutually perpendicular blank surfaces on the side surface of the insert as a reference;
roughly machining the cutting edges of the inserts, taking the positioning pin holes of the inserts as a reference, and performing independent rough machining on the cutting edge of each insert, and reserving machining quantities at the cutting edges of the inserts and the splicing seams of the inserts;
quenching the insert cutting edge, and naturally cooling in air;
processing the die holder, processing the mounting surface for mounting the insert on the die holder in place, and assembling the insert to a specified position on the die holder; and
finely machining the cutting edges of the inserts, and simultaneously machining the cutting edges of all the inserts in place;
and grinding the bottom surface and the abutted seams of the insert, and grinding the abutted seams of the bottom surface and the side surfaces of the insert to ensure that the flatness of the abutted seams of the bottom surface and the side surfaces of the insert is less than 0.05 mm.
2. The method for trimming the cutting edge of the die insert according to claim 1 wherein the step of machining the die holder comprises:
roughly machining the bottom surface of the die holder, wherein the front surface of the die holder faces upwards, at least four reference surfaces are machined on the front surface of the die holder, the die holder is turned over, and the bottom surface of the die holder is roughly machined;
the fine machining die holder bottom surface is subjected to fine machining, and a positioning key groove for determining the position of the die holder on the press machine and other structural surfaces on the bottom surface are machined on the die holder bottom surface;
making reference holes, namely making the front surface of the die holder face upwards, and processing at least three reference holes and at least three reference surfaces on the die holder by taking a positioning key slot at the bottom of the die holder and the bottom surface as references;
and processing an insert mounting surface, taking the reference hole and the reference surface on the die holder as references, processing a mounting surface for mounting the insert and other structural surfaces on the front surface of the die holder, and pointing out the position of the insert mounting screw hole.
3. The method for machining the cutting edge of an edging die insert according to claim 2, wherein said step of finishing the base surface of the die holder further comprises, prior to said step of finishing the base surface of the die holder:
and vibration aging, namely vibrating the die holder by using a vibration device, wherein the vibration time is longer than 4 hours, and the position of the vibration device on the die holder is replaced every 1 hour in the vibration process.
4. The method for machining the cutting edge of an edging die insert according to claim 2, wherein the reference hole in said step of making the reference hole has a tolerance range of +0mm to +0.05 mm.
5. The method for machining the cutting edge of an edging die insert according to claim 1, wherein in the step of roughing the cutting edge of the insert, a plurality of inserts are simultaneously mounted on the same process plate for performing the plunge milling.
6. The method for machining the cutting edge of an edging die insert according to claim 5, wherein the distance between the insert and the insert in the step of roughing the cutting edge of the insert is greater than 50 cm.
7. The method for machining the cutting edge of the trimming die insert according to claim 1, wherein the tolerance range of the diameter dimension of the insert mounting screw hole in the insert mounting hole manufacturing step is +0mm to +0.05mm, and the tolerance range of the diameter dimension of the dowel hole of the insert is +0mm to +0.05 mm.
8. The method for machining the cutting edge of the trimming die insert according to claim 1, wherein in the step of roughly machining the cutting edge of the insert, a machining amount of 0.3mm to 0.5mm is reserved at the cutting edge of the insert along the direction of the cutting edge of the insert, and a machining amount of 0.3mm to 0.5mm is also reserved at a splicing surface of the insert and an adjacent insert.
9. The method for machining the cutting edge of an trimming die insert according to claim 1, wherein the quenching in the insert cutting edge quenching step is flame quenching, and the flame quenching temperature is 630-650 ℃.
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| CN201911394245.6A CN111136433B (en) | 2019-12-30 | 2019-12-30 | Method for processing insert cutting edge of trimming die |
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| CN201911394245.6A CN111136433B (en) | 2019-12-30 | 2019-12-30 | Method for processing insert cutting edge of trimming die |
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| CN111136433B true CN111136433B (en) | 2021-06-22 |
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| CN112077214B (en) * | 2020-08-05 | 2022-08-19 | 格致汽车科技股份有限公司 | Machining method for functional insert of large stamping die |
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| KR101990498B1 (en) * | 2018-12-28 | 2019-06-18 | 에스와이시 주식회사 | Seismic Retaining Wall Block and Its Construction Method |
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| JPH0699456A (en) * | 1992-09-18 | 1994-04-12 | Nippon Zeon Co Ltd | Manufacture of insert molded product and mold device therefor |
| CN101284294A (en) * | 2007-04-10 | 2008-10-15 | 上海电气集团上海电机厂有限公司 | Silicon steel sheet punching die blade blocks and processing technique |
| CN103586652A (en) * | 2013-10-15 | 2014-02-19 | 昆山宏凌电子有限公司 | Process for machining male and female dies |
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